diff options
Diffstat (limited to 'drivers/usb/cdns3/cdns3-imx.c')
| -rw-r--r-- | drivers/usb/cdns3/cdns3-imx.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/usb/cdns3/cdns3-imx.c b/drivers/usb/cdns3/cdns3-imx.c index 7990fee03fe4..74e758dc0895 100644 --- a/drivers/usb/cdns3/cdns3-imx.c +++ b/drivers/usb/cdns3/cdns3-imx.c @@ -250,7 +250,7 @@ static void cdns3_set_wakeup(struct cdns_imx *data, bool enable) static int cdns_imx_platform_suspend(struct device *dev, bool suspend, bool wakeup) { - struct cdns3 *cdns = dev_get_drvdata(dev); + struct cdns *cdns = dev_get_drvdata(dev); struct device *parent = dev->parent; struct cdns_imx *data = dev_get_drvdata(parent); void __iomem *otg_regs = (void __iomem *)(cdns->otg_regs); @@ -361,6 +361,39 @@ static int cdns_imx_suspend(struct device *dev) return 0; } + + +/* Indicate if the controller was power lost before */ +static inline bool cdns_imx_is_power_lost(struct cdns_imx *data) +{ + u32 value; + + value = cdns_imx_readl(data, USB3_CORE_CTRL1); + if ((value & SW_RESET_MASK) == ALL_SW_RESET) + return true; + else + return false; +} + +static int __maybe_unused cdns_imx_system_resume(struct device *dev) +{ + struct cdns_imx *data = dev_get_drvdata(dev); + int ret; + + ret = cdns_imx_resume(dev); + if (ret) + return ret; + + if (cdns_imx_is_power_lost(data)) { + dev_dbg(dev, "resume from power lost\n"); + ret = cdns_imx_noncore_init(data); + if (ret) + cdns_imx_suspend(dev); + } + + return ret; +} + #else static int cdns_imx_platform_suspend(struct device *dev, bool suspend, bool wakeup) @@ -372,6 +405,7 @@ static int cdns_imx_platform_suspend(struct device *dev, static const struct dev_pm_ops cdns_imx_pm_ops = { SET_RUNTIME_PM_OPS(cdns_imx_suspend, cdns_imx_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(cdns_imx_suspend, cdns_imx_system_resume) }; static const struct of_device_id cdns_imx_of_match[] = { |